In last weeks lab, we defined the Triangle class with three sides. In a triangle, the sum of any two sides is greater than the other side. The Triangle class must adhere to this rule. Create the IllegalTriangleException class and modify the constructor of the Triangle class to throw an IllegalTriangleException object if a triangle is created with sides that violate the rule.

package Lab8;

public class Triangle extends GeometricObject

{

//Three double data fields named side1, side2, and side3

private double side1,side2,side3;

private String color;

private boolean filled;

//A no-arg constructor that creates a default triangle.

public Triangle()

{

side1=side2=side3=1.0;

}

//A constructor that creates a triangle with the specified side1, side2, and side3.

public Triangle(double side1,double side2,double side3)

{

this.side1=side1;

this.side2=side2;

this.side3=side3;

}

//The accessor methods for all three data fields.

public double getSide1() {

return side1;

}

public void setSide1(double side1) {

this.side1 = side1;

}

public double getSide2() {

return side2;

}

public void setSide2(double side2) {

this.side2 = side2;

}

public double getSide3() {

return side3;

}

public void setSide3(double side3) {

this.side3 = side3;

}

public void setColor(String color)

{

this.color=color;

}

public String getColor()

{

return this.color;

}

public boolean isFilled() {

return filled;

}

public void setFilled(boolean filled) {

this.filled = filled;

}

//A method named getArea() that returns the area of this triangle.

public double getArea()

{

//finding half of the perimeter

double p=this.getPerimeter()/2;

//Calculating area using p value

double area=Math.sqrt(p*(p-side1)*(p-side2)*(p-side3));

//returning area

return area;

}

//A method named getPerimeter() that returns the perimeter of this triangle.

public double getPerimeter()

{

//returning perimeter

return side1+side2+side3;

}

//A method named toString() that returns a string description for the triangle.

public String toString()

{

return "Triangle: side1 = " + side1 + " side2 = " + side2 + " side3 = " + side3;

}

}